I think he jumped. While I never SEE him do this, I know he can jump quite high. I may have to start putting him in a bathroom or other uncarpeted area with his potty tray and water while we're. gone. He's not usually alone for more than a few hours.

You need a 3ft tall ex-pen and don't put a crate inside as the puppy will jump on top and over the ex-pen. My ex-pen was 6 feet long, almost 3ft wide and 3ft tall. The ex-pen door opened into a kitchen-family area from one entrance. The second entrance I installed a swinging gate. When the ex-pen door was open Patti could wonder in and out from the ex-pen into the family living area. When we didn't have eyes on her or left the room, Patti was confined to the ex-pen. In the ex-pen we had a blanket, water, food tray, toys and potty tray. Patti preferred sleeping on the tile floor so I removed a fluffy bed.

Flat footed Patti easily jumps a two foot gate. She, also, climbs and jumps. We used the ex-pen until she was 10 months old. If we'd kept her in the ex-pen beyond that age, she probably would have figured out have to climb the rails and get out. By 10 months she was indoor house broken and had free range of most of the house.

Havanese are quite resourceful.